A North Korean official told CNN following Wednesday's launch Pyongyang was not interested in diplomacy with the US until it had fully demonstrated its nuclear deterrent capabilities.

Reiterating remarks made in the past, the official said one step was to conduct an above-ground nuclear detonation or "large-scale hydrogen bomb" test. The other was the "testing of a long-range ICBM," the implication being this had been achieved with the most recent launch.In a statement following the test, Pyongyang said the Hwasong-15 "meets the goal of the completion of the rocket weaponry system development."